Apparatus and method for casting



k C. W. VAN RANST. APPARATUS AND METHOD FOR CASTING.

APPLICATIONHLED Maze, 1919.

71 ,595, PatentedJuljZfi, 1921.

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Specification of Letters Patent.

. Application filed August 2c, 1919. Serial is, 820,010,

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Be it known that I, CORNELIUS W. 'VAN RANs'r, a citizen of the United States, residing at 19 Manhattan avenue, New Rochelle, in the county of Westchester, State of New York, have invented certain new and-useful Improvements in Apparatus and Methods for Casting, of WhlCll the following is a specification. p

This invention relates to method" and apparatus for the casting of bars or the like continuously and particularly one in which process, and Elg; 2 is a side elevation of the same. Y I The corresponding parts arereferred to in both the drawings and the specification by similar reference characters.

In the drawings 10 re resents an illustrative form of mold he d centrally in a cooling chamb'erll, this chamber being pro- 7 vided with the pipes 12 and '13 by which a vention illustrated, is made to vibrate vertically and in order to permit this motion" Water circulation therethrough may be maintained. For reasons to be pointed out hereinafter the mold 10, in the form of my inwithout interfering with the water jacketing I preferably provide'a pair of flexible diaphragms 14, 15 connected to the mold 10 and to the cylinder 11 by suitable plates 16, 17 so as to make a water-ti ht joint As a means for en porting an moving the mold 10 I provi c any suitable. mechanism,

and as illustrative of one form of such device I have shown a lever 18 pivoted at 19 on the machineframe 20, and connected by a pitman 21 to the bottom of the plate 16 p which supports the mold 10. Vibratory motion is'give'n to the pitman21 by a rod 22 operated by an eccentric 23 on a driving shaft 24 connected with any suitable source of power as a motor 25, theshaft 24 being mounted in suitable bearings in the machine rams 20,

- Vertically movable within the mold 10 is v a mold bottom or plunger connected to Patented July 26, 192i. 1

a rod 31 provided with rack teeth 32 en-- gaging the teeth of a-pinion-33 on a shaft 7' 34 mounted in hearings inthe" frames 20. The shaft 34 is actuated by a gear 35 driven by a worm 36 on the shaft 24. The rod 31 moves in bearings 40, 41 connected tothemachine frames, and the plunger30 is provided with a threaded opening 42'for a purpose to be hereinafter described.

Supported on the cylinder 11 is a funnel v 43 having a neck'44 which is smaller than the opening in the mold 10.1

In producing certain forms of castings, itis desirable that such castings bemade in'lo-ng bars of any desired shape in cross section and I produce such cast bars by means of the apparatus list-described, in the following manner. ith the parts in the position shown in the drawings, the motor 25 is started in operation which not only vibrates the mold 10 up and'd'o'wn rapidly through a short; distance, but also slowly draws the rod 31 and the plunger 30 downward. The Water circulation is turned our The molten metal, which preferably is one of the softer kinds as lead, zinc, brass, or

any of the alloys thereof, is then poured into the funnel 43. The first m'etalfills the opening 42 and hardens in the threads thereof, and the molten metal is poured into the mold 10 only as fast-as the plunger 30 is 3 being moved downward. The metal iscooled by the water circulation through'the pipes 12 and 13 so that by the time the plunger 30 has reached the bottom of the mold and passes out therefrom, the metal directly above it has been hardened into a solid rod. The uring may be continued as long as desired and until the plunger 30 has reached the end of its stroke, which, of course, may be made of any desired length when the machine is constructed.

The constant vibration of the mold 10 prevents the metal from freezing to that mold as it is being hardened, and consequently there exists at all times during the recess a solid rod, the upper end of which within the mold 10 becomes softer andsofter as the top of the mold is approached, but with no part of the metal, elther cold of molten, adhering to the mold 10.

It will be understood that 'my novel method. comprises in essence the relative I movement ofthe mold and the material being cast so that adherence between the two is departing from the spirit of my'invention. S uch relat1ve motion maybeobtained by a rotation of the mold where circular bars are being cast,"and such rotation might be either continuous or oscillatory; I- prefer the form of vibration which I e shown, however, because such motion is adapted for an cross sectional bar.

. ile I refer to provide the plunger with some orm of device by which t e bar being cast will be attached was plunger I V and thus be subjected to a pull as the plunger is lowered, such attachment is not essential.

Any other forml of removable attachment may beused in 42. v

t will also be understood that-my novel method may of a paratus and that the device s own-is mere y illustrative of my preferred form.

I claim: 1. The method of casting bars which consists in pouring molten metal-into one end of a short mold having an opening of substantially uniform cross section, cooling the instead of thethreaded open- 'while continuin 'the opposite en be carried out byman forms draw sald plunger slowly metal'in the mold, withdrawing thd cooled.

metal from the opposite end of the mold to our molten metal into of the mold and. reciprocatmg t e mold relatively rapidly longitudina ly of its length while the pourlng and re-- moval is continued.

- 2. A mold having an opening of substantially uniform cross section, a plunger movably mounted in said opening, means to move said plunger lengthwise of the opening and means to move the moldrelatively to said plunger and longitudinally of said opening. 3. A mold having an opening of substantially uniform cross section, a plunger movably mounted in said opening, means to move said plunger lengthwise of the opening and means to rec procate the mold longitudinally of said opening. a

4; A mold having an opening of substantially uniform cross section, a plunger movably mounted in said opening, means to long tudinally of and means to rec procate said said opening,

y relatively said plunger;

mold rapid CORNELIUS W. TvAN BANS-T. 

